I now remember why I never used the ACV rinse!! I now remember doing it a long time ago. GWAD, my memory is going!
Anyway, I get way too soft hair making it limp with very little curl afterwards. So, I had to re-wash with a sulfate shampoo (my hair loves sulfates) and start all over.
I went to Aveda and bought some hair detoxifier. Maybe that will work for hard water build up instead of ACV.

Natural hair color - dark brunette
Fine, thinish hair/3a, 3b